Dr. William D Kasimer

Individual provider Anatomic Pathology Physician · NPI 1265485288

Dr. William D Kasimer practises Pathology in Weymouth, Massachusetts. Graduated from University of Pittsburgh School of Medicine in 1984, 42 years ago. Practices with Metro South Pathology, Inc, a 5-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying: 42
Trained at: University of Pittsburgh School of Medicine
Licensed in: MA
In the registry since: 2006

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Practice location Address checks out

85 Columbian St
Weymouth, MA 02190-2416
Phone: (781) 624-8397

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anatomic Pathology Physician (primary)	Taxonomy 207ZP0101X · Licence 60294 (MA)

Record details

NPI number	1265485288
Entity type	Individual (Type 1)
Gender	Male
Sole proprietor	No
NPI enumerated	May 19, 2006
Last updated in NPPES	February 12, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialty	PATHOLOGY
Medical school	UNIVERSITY OF PITTSBURGH SCHOOL OF MEDICINE
Graduated	1984 (42 years in practice)
Group practice	Metro South Pathology, Inc. — 5 clinicians
Accepts Medicare assignment	Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients	1,464
Services billed	4,482 a service is one billed item, such as a visit, a test or a procedure
Average patient age	76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage	$42 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Brigham And Women'S Hospital Hospital · Boston, MA
South Shore Hospital Hospital · South Weymouth, MA

Also affiliated with 1 hospital, which CMS identifies by certification number only.

Colleagues at Metro South Pathology, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Dr. Ludmila Epshteyn, MD Anatomic Pathology & Clinical Pathology Physician · South Weymouth, MA
Shoreh R Fazeli Anatomic Pathology & Clinical Pathology Physician · South Weymouth, MA
Dr. Peter Joseph Ferlisi, MD Anatomic Pathology & Clinical Pathology Physician · Weymouth, MA
Kyle L Viani Student in an Organized Health Care Education/Training Program · Boston, MA